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Automatic reduction of the hydrocarbon reaction mechanisms in fusion edge plasma

4229

 ;  ;  ;

2006
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 4229, 118 S. ()

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Report No.: Juel-4229

Abstract: For predictions of the tritium inventory in future fusion devices like ITER, the amount of eroded carbon and the hydrogen concentrations in co-deposited hydrocarbon layers have to be predicted quantitatively. Predictions about the locations of co-deposited layers are also necessary in order to design deposition diagnostics and layer removal methods. This requires a detailed physical understanding of the erosion and carbon migration processes, and computer simulations. For accurate simulation the multi-species code EIRENE would require to include over 50 participating species. Because such a calculation is computationally prohibitive current codes are being reduced, typically in an ad hoc fashion. In this work the potential of the mathematically sound method of intrinsic low dimensional manifolds (ILDM) for computational speed-up of the hydrocarbon transport problem simulation is thoroughly investigated. It is basically the Monte Carlo implementation of EIRENE that makes this task so challenging. As the method can substantially ameliorate the results in comparison to the conventional reduction mechanisms a step towards ILDM-reduced kinetics is conceived and tested.

Keyword(s): hydrocarbon ; reaction mechanism ; fusion technology


Note: Record converted from JUWEL: 18.07.2013

Contributing Institute(s):
  1. Plasmaphysik (IEF-4)

Appears in the scientific report 2013
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 Record created 2013-07-18, last modified 2022-09-30